You don’t have to login to your adsense account if you are already logged into your Google account. By this way you can avoid typing in the credentials every single time.
Read this: Adsense Privacy Policy
But you can always bookmark this link:
https://www.google.com/adsense
If you don’t have an adsense account then read this: Adsense Approval
This is how I normally log onto my Adsense account:
1) Go to Google.com
2) Click on “Advertising Programs” at the bottom of the search box
3) And then you will be displayed with 2 options. One is Adwords and the other is Adsense. So just click on the Adsense link and you are in!
This is a tutorial for people who are confused about the direct link to Adsense account to login.
Posted by Ybo